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An online self-calibration method for angular displacement sensor

A technology of angular displacement sensor and sensor, which is applied in the direction of instruments, measuring devices, and electrical devices, etc., can solve problems such as discomfort, and achieve the effect of fewer sampling points

Inactive Publication Date: 2015-08-19
CHONGQING UNIV OF TECH
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  • Description
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Problems solved by technology

However, the currently known calibration methods generally require the use of standards or higher-precision angular displacement measuring instruments, which are not suitable for online
In addition, there is a public method that uses two electromagnetic angular displacement sensors with different numbers of poles to achieve self-calibration, but this method requires two sets of sensor systems with different numbers of poles.

Method used

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  • An online self-calibration method for angular displacement sensor
  • An online self-calibration method for angular displacement sensor
  • An online self-calibration method for angular displacement sensor

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Embodiment Construction

[0041] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0042] see figure 1 , an error online self-calibration method of an angular displacement sensor system is: in a magnetic grating sensor composed of a main reading head 1, an auxiliary reading head 2, a magnetic disk 3, a rotor 4 and a stator 5, the magnetic disk 3 is fixed on the stator 5, The main reading head 1 is fixed on the rotor 4 and rotates with the measured object, and the auxiliary reading head 2 can be fixed with the rotor 4 or the stator 5; the main reading head 1 can read the disk to realize the angular displacement of the measured object Measurement; the auxiliary reading head 2 can also read the disk, and the rotor can be rotated under the indication of the auxiliary reading head 2, so that a fixed special angle relative movement can be realized between the sensor rotor and the stator. In this embodiment, the auxiliary...

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Abstract

The invention discloses an online self-calibration method for an angular displacement sensor. A main reading head and an auxiliary reading head are arranged inside a sensor system, a rotor of the sensor is fixedly connected with a rotary portion of a measured object and is respectively indicated by indicating values of the main reading head and the auxiliary reading head to rotate to a series of special positions until rotating by a complete 360-degree angle, the indicating values of the main reading head are recorded when the rotor rotates at the special positions, a measuring error function of the sensor is acquired after data of the indicating values are processed, and online self-calibration for the sensor is realized. In the self-calibration method, according to the circumferential closed principle in angular measurement, the main reading head is used for measurement by the aid of the auxiliary reading head, and online self-calibration for the sensor can be realized by processing measured data without a standard device and other high-precision angular displacement measuring instruments.

Description

technical field [0001] The invention belongs to the field of precision displacement measurement, and is particularly suitable for on-line self-detection of measurement errors of angular displacement sensors. Background technique [0002] The angular displacement sensor is an angular displacement measuring element. Due to deviations in processing, installation, and electrical parameters, there are errors in the angular displacement measurement of this type of sensor. Often, measurement accuracy can be improved by calibrating these sensors. However, the currently known calibration methods generally require the use of a standard or a higher-precision angular displacement measuring instrument, which is not suitable for online implementation. In addition, there is a public method that uses two electromagnetic angular displacement sensors with different numbers of poles to realize self-calibration, but this method requires two sets of sensor systems with different numbers of pol...

Claims

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Application Information

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IPC IPC(8): G01B7/30
Inventor 鲁进彭东林陈锡侯张天恒汤其富
Owner CHONGQING UNIV OF TECH
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